Which regex flavor does this use?

It uses JavaScript's built-in RegExp engine, which supports most common regex features.

Can I test multiline patterns?

Yes, enable the multiline (m) flag to make ^ and $ match line boundaries.

Are there regex examples included?

The tool starts with a sample pattern — you can modify it or enter your own regex.

Regex Tester

Test and debug regular expressions with real-time matching and highlighting.

Need to quickly regex tester without installing software or creating an account? This tool helps you complete the task in seconds.

Regular Expression

//gi

Test String

What problem does this tool solve?

Need to quickly regex tester without installing software or creating an account? This tool helps you complete the task in seconds. You can use it directly in your browser and get practical output that helps you finish work faster.

Key Features

•Real-time match highlighting as you type
•Support for all JavaScript regex flags
•Shows match count, groups, and positions
•Great for learning and debugging regex patterns
•Runs entirely in the browser

Popular Use Cases

•Email validation: ^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$
•Extracting dates: \d{4}-\d{2}-\d{2}
•Matching URLs: https?://[^\s]+

Related Search Terms

regex tester onlinefree regex testerregex tester toolbest regex testerhow to use regex testerregex tester for developerinstant resultsno signup requiredbrowser based tool

Looking for answers? Check the FAQ section below for quick solutions and best practices.

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What is Regex Tester?

The Regex Tester lets you write, test, and debug regular expressions in real time. Enter a pattern and test string to see all matches highlighted instantly, with detailed match information including groups and positions.

How to Use Regex Tester

1Enter your regex pattern in the pattern input field.
2Set regex flags (global, case-insensitive, multiline) as needed.
3Type or paste your test string in the text area.
4View highlighted matches and detailed match list in real time.
5Iterate on your pattern until it matches correctly.

Example Usage

→Email validation: ^[\w.-]+@[\w.-]+\.[a-zA-Z]{2,}$

→Extracting dates: \d{4}-\d{2}-\d{2}

→Matching URLs: https?://[^\s]+

Benefits

✓Real-time match highlighting as you type

✓Support for all JavaScript regex flags

✓Shows match count, groups, and positions

✓Great for learning and debugging regex patterns

✓Runs entirely in the browser